Improvement in carving-machines



UNITED STATES PATENT OFFICE.'-

HERRERT eoTTRELL, 0E NEWARK, NEW JERsEY,` AssIeNoR To coTTRELL` sToNE-MAeHINERY COMPANY, or NEW YORK, N. Y.

IMPROVEMENT IN CARVING-MACHINES.

Specification forming part of Letters Patent N o. 144,745, dated November 18, 1873 application filed A April 25, 1873.

. To all whom t may concern:

Be it known that I, HERBERT COTTRELL,

afforded for working over different surfaces or at various angles.

In the accompanying drawing, which forms a part of this specification, Figure 1 represents a partly-sectional side elevation of a machine constructed in accordance with my invention. Fig. 2 is a horizontal section on the line a' w. Fig. 3, a vertical section upon a larger scale, at the line y y, in illustration of the turning head-block, which carries the carving, surfacing, or polishing tool. Fig. 4 is a longitudinal view of a rotary polishing-tool, designed to be used in the machine, and constructed to conform to sunken lines or irregular surfaces.

surmounted bv a compound swivel, B, and

"carrying a vertically-adjustable table, C, said table being provided on its upper surface with diagonally-arranged slots b b, for the adjustment of clamping devices to hold the work, and being detachable to admit of' working blocks too large to secure by clamps. The compound swivel B is tted with a vertical pivot, c, and side or horizontal pivots d, carrying turning slide-guides `e c, the latter providing for movement up or down and backward and forward, or lengthwise, by means of side or longitudinal grooves f of a bar, D, that carries the head-block E, in which the toolspindle F rotates, and the vertical pivot c, providing, by the turning of the swivel B, for the horizontal or lateral swing of said bar with its attached tool-spindle and tool.

By these means the bar D has a compound motion as a lever, of which .the bolts or pivots c and d are the fulcruins, and is `capable of extension or contraction, as required, by a han-. dle, g, attached to the head-block E, carried j p by the bar. Figs. `l and 2 show, by dotted c lines, certain of these adjustments.

The head-block E is with bearings 7L h, for the tool-spindle F torotate in, and is fitted to turn on a pivot, @'at the forward end of the bar, and against or in contact with a face-plate, 7c, attached to Asaid end of the bar, and provided with stops or guides Z, which enter curvilinear slots m in the head-block. j

This adjustment of the head-block, which is shown by full and dotted lines in Fig. 3, provides for the angular adjustment of the tool or its spindle F, relatively to the table C or surface to be operated upon.

G is the spindle or shaft by which rotary motion is communicated to the tool-spindle F. This shaft is bothA extensible and ilexible, to provide for swinging the operating-tool laterally, by the turning of the swivel B on its pivot` c, up-and-down adjustment of the bar D on the pivots d, or various angular `positions of the j tool-spindle F, by the turning of the head-block E on its pivot t', according to requirements.`

This universal adjustment of the tool carried by the spindle F is provided for by coiled wire or other flexible connections H H, at the ends of the shaft F, and longitudinally-sliding uppcr-soeketed extension portion or section of said shaft within a` hanger, I, subject to the control of a spring, s, that tends tokeep the shaft raised; or the longitudinal adjustment or extension and contraction of the shaft might l be provided for by division of the main or` lower portion of the shaft, and connectionof such divided sections by a suitable box with feather and groove; or both of such extension-adjustments maybe used. The iiexible connections H H at the upper and lowerends of the main portion or body of the Vshaft F provide for varying the angular positions of the shaft and tool carried by it, as herein-beprovided, on its face,

fore referred to. Saidshaft is rotated by a pulley, n, on its upper section, .and thus rotary motion communicated to the tool-spindle F.

B y reason of the manner in which the power is communicated directly to the shaft, and provision for adjustment of the rotating tool in every direction, and to various angles orportions of the surface to be operated on, Without resorting to pulleys or belts ruiming in close proximity to the tool, said surface is prevented from becoming soiled with oil or grease, which is important when the material being ac ted upon is marble. Access, however, is had, for the tool, by the hereinbefore-specied adjustments to all parts of the table, as Well as provision for operating the different angles. u

lhcn the machine is used for cutting, an adjustable hand-rest may be attached to the table in proximity to the handle g.

The rotating tool-spindle F is suitably constructed to carry Vvarious tools for cutting and carving stone, also for surfacing and polishing1 it, including polishing-tools made to conform to sunken or 'rregular surfaces, the prole of the tool corresponding to that of the sunken or irregular surface to be polished. Figs.,1 and 4L show such a tool, M, suitable for polishing grooved surfaces. These polishing-tools, operating in connection With devices or mechanism for moving'them over or in line with the .surfaces to be Worked, substantially as hereinbefore specified, may be made of any suitable material or materials, such, for instance, as a composition of emery and other substance molded into form; soft metal having emery or other cutting material embedded in its surface; wood, gutta-percha, or rubber used in. connection with grit and ordinary polishing-materials; or they may be covered with leather, felt, or cloth, for use with polishing materials of different kinds.

What is here claimed, and desired to be secured by Letters Patent, is y 1. The swivel B and its pivot c, in combination with the pivots d d, the turning slideguides e e, and the longitudinally-groovcd bar D, essentially as described.

2. The upper pulley n, in combination with the extensible shaft Gr, the spring s, the iexible connections H H, the `tool-spindle F, the turning head-block E, and the bar D, capable of lateral and up-and-down adjustment, essentially as described.

HERBERT COTTRELL.

Vitncsses HENRY T. BROWN, MICHAEL RYAN. 

